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spl_iterators.c
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/*
+----------------------------------------------------------------------+
| Copyright (c) The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| https://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Marcus Boerger <[email protected]> |
+----------------------------------------------------------------------+
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "php.h"
#include "zend_exceptions.h"
#include "zend_interfaces.h"
#include "ext/pcre/php_pcre.h"
#include "spl_iterators.h"
#include "spl_iterators_arginfo.h"
#include "spl_array.h" /* For spl_ce_ArrayIterator */
#include "spl_exceptions.h"
#include "zend_smart_str.h"
#ifdef accept
#undef accept
#endif
PHPAPI zend_class_entry *spl_ce_RecursiveIterator;
PHPAPI zend_class_entry *spl_ce_RecursiveIteratorIterator;
PHPAPI zend_class_entry *spl_ce_FilterIterator;
PHPAPI zend_class_entry *spl_ce_CallbackFilterIterator;
PHPAPI zend_class_entry *spl_ce_RecursiveFilterIterator;
PHPAPI zend_class_entry *spl_ce_RecursiveCallbackFilterIterator;
PHPAPI zend_class_entry *spl_ce_ParentIterator;
PHPAPI zend_class_entry *spl_ce_SeekableIterator;
PHPAPI zend_class_entry *spl_ce_LimitIterator;
PHPAPI zend_class_entry *spl_ce_CachingIterator;
PHPAPI zend_class_entry *spl_ce_RecursiveCachingIterator;
PHPAPI zend_class_entry *spl_ce_OuterIterator;
PHPAPI zend_class_entry *spl_ce_IteratorIterator;
PHPAPI zend_class_entry *spl_ce_NoRewindIterator;
PHPAPI zend_class_entry *spl_ce_InfiniteIterator;
PHPAPI zend_class_entry *spl_ce_EmptyIterator;
PHPAPI zend_class_entry *spl_ce_AppendIterator;
PHPAPI zend_class_entry *spl_ce_RegexIterator;
PHPAPI zend_class_entry *spl_ce_RecursiveRegexIterator;
PHPAPI zend_class_entry *spl_ce_RecursiveTreeIterator;
typedef enum {
RS_NEXT = 0,
RS_TEST = 1,
RS_SELF = 2,
RS_CHILD = 3,
RS_START = 4
} RecursiveIteratorState;
typedef struct _spl_sub_iterator {
zend_object_iterator *iterator;
zval zobject;
zend_class_entry *ce;
RecursiveIteratorState state;
zend_function *haschildren;
zend_function *getchildren;
} spl_sub_iterator;
typedef struct _spl_recursive_it_object {
spl_sub_iterator *iterators;
int level;
RecursiveIteratorMode mode;
int flags;
int max_depth;
bool in_iteration;
zend_function *beginIteration;
zend_function *endIteration;
zend_function *callHasChildren;
zend_function *callGetChildren;
zend_function *beginChildren;
zend_function *endChildren;
zend_function *nextElement;
zend_class_entry *ce;
zend_string *prefix[6];
zend_string *postfix[1];
zend_object std;
} spl_recursive_it_object;
typedef struct _spl_recursive_it_iterator {
zend_object_iterator intern;
} spl_recursive_it_iterator;
typedef struct _spl_dual_it_object {
struct {
zval zobject;
zend_class_entry *ce;
zend_object *object;
zend_object_iterator *iterator;
} inner;
struct {
zval data;
zval key;
zend_long pos;
} current;
dual_it_type dit_type;
union {
struct {
zend_long offset;
zend_long count;
} limit;
struct {
zend_long flags; /* CIT_* */
zend_string *zstr;
zval zchildren;
zval zcache;
} caching;
struct {
zval zarrayit;
zend_object_iterator *iterator;
} append;
struct {
zend_long flags;
zend_long preg_flags;
pcre_cache_entry *pce;
zend_string *regex;
regex_mode mode;
} regex;
zend_fcall_info_cache callback_filter;
} u;
zend_object std;
} spl_dual_it_object;
static zend_object_handlers spl_handlers_rec_it_it;
static zend_object_handlers spl_handlers_dual_it;
static inline spl_recursive_it_object *spl_recursive_it_from_obj(zend_object *obj) /* {{{ */ {
return (spl_recursive_it_object*)((char*)(obj) - XtOffsetOf(spl_recursive_it_object, std));
}
/* }}} */
#define Z_SPLRECURSIVE_IT_P(zv) spl_recursive_it_from_obj(Z_OBJ_P((zv)))
static inline spl_dual_it_object *spl_dual_it_from_obj(zend_object *obj) /* {{{ */ {
return (spl_dual_it_object*)((char*)(obj) - XtOffsetOf(spl_dual_it_object, std));
} /* }}} */
#define Z_SPLDUAL_IT_P(zv) spl_dual_it_from_obj(Z_OBJ_P((zv)))
#define SPL_FETCH_AND_CHECK_DUAL_IT(var, objzval) \
do { \
spl_dual_it_object *it = Z_SPLDUAL_IT_P(objzval); \
if (it->dit_type == DIT_Unknown) { \
zend_throw_error(NULL, "The object is in an invalid state as the parent constructor was not called"); \
RETURN_THROWS(); \
} \
(var) = it; \
} while (0)
#define SPL_FETCH_SUB_ELEMENT(var, object, element) \
do { \
if(!(object)->iterators) { \
zend_throw_error(NULL, "The object is in an invalid state as the parent constructor was not called"); \
return; \
} \
(var) = (object)->iterators[(object)->level].element; \
} while (0)
#define SPL_FETCH_SUB_ELEMENT_ADDR(var, object, element) \
do { \
if(!(object)->iterators) { \
zend_throw_error(NULL, "The object is in an invalid state as the parent constructor was not called"); \
RETURN_THROWS(); \
} \
(var) = &(object)->iterators[(object)->level].element; \
} while (0)
#define SPL_FETCH_SUB_ITERATOR(var, object) SPL_FETCH_SUB_ELEMENT(var, object, iterator)
static void spl_recursive_it_dtor(zend_object_iterator *_iter)
{
spl_recursive_it_iterator *iter = (spl_recursive_it_iterator*)_iter;
spl_recursive_it_object *object = Z_SPLRECURSIVE_IT_P(&iter->intern.data);
zend_object_iterator *sub_iter;
if (object->iterators) {
while (object->level > 0) {
if (!Z_ISUNDEF(object->iterators[object->level].zobject)) {
sub_iter = object->iterators[object->level].iterator;
zend_iterator_dtor(sub_iter);
zval_ptr_dtor(&object->iterators[object->level].zobject);
}
object->level--;
}
object->iterators = erealloc(object->iterators, sizeof(spl_sub_iterator));
object->level = 0;
}
zval_ptr_dtor(&iter->intern.data);
}
static zend_result spl_recursive_it_valid_ex(spl_recursive_it_object *object, zval *zthis)
{
zend_object_iterator *sub_iter;
int level = object->level;
if(!object->iterators) {
return FAILURE;
}
while (level >=0) {
sub_iter = object->iterators[level].iterator;
if (sub_iter->funcs->valid(sub_iter) == SUCCESS) {
return SUCCESS;
}
level--;
}
if (object->endIteration && object->in_iteration) {
zend_call_method_with_0_params(Z_OBJ_P(zthis), object->ce, &object->endIteration, "endIteration", NULL);
}
object->in_iteration = 0;
return FAILURE;
}
static zend_result spl_recursive_it_valid(zend_object_iterator *iter)
{
return spl_recursive_it_valid_ex(Z_SPLRECURSIVE_IT_P(&iter->data), &iter->data);
}
static zval *spl_recursive_it_get_current_data(zend_object_iterator *iter)
{
spl_recursive_it_object *object = Z_SPLRECURSIVE_IT_P(&iter->data);
zend_object_iterator *sub_iter = object->iterators[object->level].iterator;
return sub_iter->funcs->get_current_data(sub_iter);
}
static void spl_recursive_it_get_current_key(zend_object_iterator *iter, zval *key)
{
spl_recursive_it_object *object = Z_SPLRECURSIVE_IT_P(&iter->data);
zend_object_iterator *sub_iter = object->iterators[object->level].iterator;
if (sub_iter->funcs->get_current_key) {
sub_iter->funcs->get_current_key(sub_iter, key);
} else {
ZVAL_LONG(key, iter->index);
}
}
static void spl_recursive_it_move_forward_ex(spl_recursive_it_object *object, zval *zthis)
{
zend_object_iterator *iterator;
zend_class_entry *ce;
zval retval, child;
zend_object_iterator *sub_iter;
SPL_FETCH_SUB_ITERATOR(iterator, object);
while (!EG(exception)) {
next_step:
iterator = object->iterators[object->level].iterator;
switch (object->iterators[object->level].state) {
case RS_NEXT:
iterator->funcs->move_forward(iterator);
if (EG(exception)) {
if (!(object->flags & RIT_CATCH_GET_CHILD)) {
return;
} else {
zend_clear_exception();
}
}
ZEND_FALLTHROUGH;
case RS_START:
if (iterator->funcs->valid(iterator) == FAILURE) {
break;
}
object->iterators[object->level].state = RS_TEST;
/* break; */
/* TODO: Check this is correct */
ZEND_FALLTHROUGH;
case RS_TEST:
if (object->callHasChildren) {
zend_call_method_with_0_params(Z_OBJ_P(zthis), object->ce, &object->callHasChildren, "callHasChildren", &retval);
} else {
zend_class_entry *ce = object->iterators[object->level].ce;
zend_object *obj = Z_OBJ(object->iterators[object->level].zobject);
zend_function **cache = &object->iterators[object->level].haschildren;
zend_call_method_with_0_params(obj, ce, cache, "haschildren", &retval);
}
if (EG(exception)) {
if (!(object->flags & RIT_CATCH_GET_CHILD)) {
object->iterators[object->level].state = RS_NEXT;
return;
} else {
zend_clear_exception();
}
}
if (Z_TYPE(retval) != IS_UNDEF) {
bool has_children = zend_is_true(&retval);
zval_ptr_dtor(&retval);
if (has_children) {
if (object->max_depth == -1 || object->max_depth > object->level) {
switch (object->mode) {
case RIT_LEAVES_ONLY:
case RIT_CHILD_FIRST:
object->iterators[object->level].state = RS_CHILD;
goto next_step;
case RIT_SELF_FIRST:
object->iterators[object->level].state = RS_SELF;
goto next_step;
}
} else {
/* do not recurse into */
if (object->mode == RIT_LEAVES_ONLY) {
/* this is not a leave, so skip it */
object->iterators[object->level].state = RS_NEXT;
goto next_step;
}
}
}
}
if (object->nextElement) {
zend_call_method_with_0_params(Z_OBJ_P(zthis), object->ce, &object->nextElement, "nextelement", NULL);
}
object->iterators[object->level].state = RS_NEXT;
if (EG(exception)) {
if (!(object->flags & RIT_CATCH_GET_CHILD)) {
return;
} else {
zend_clear_exception();
}
}
return /* self */;
case RS_SELF:
if (object->nextElement && (object->mode == RIT_SELF_FIRST || object->mode == RIT_CHILD_FIRST)) {
zend_call_method_with_0_params(Z_OBJ_P(zthis), object->ce, &object->nextElement, "nextelement", NULL);
}
if (object->mode == RIT_SELF_FIRST) {
object->iterators[object->level].state = RS_CHILD;
} else {
object->iterators[object->level].state = RS_NEXT;
}
return /* self */;
case RS_CHILD:
if (object->callGetChildren) {
zend_call_method_with_0_params(Z_OBJ_P(zthis), object->ce, &object->callGetChildren, "callGetChildren", &child);
} else {
zend_class_entry *ce = object->iterators[object->level].ce;
zend_object *obj = Z_OBJ(object->iterators[object->level].zobject);
zend_function **cache = &object->iterators[object->level].getchildren;
zend_call_method_with_0_params(obj, ce, cache, "getchildren", &child);
}
if (EG(exception)) {
if (!(object->flags & RIT_CATCH_GET_CHILD)) {
return;
} else {
zend_clear_exception();
zval_ptr_dtor(&child);
object->iterators[object->level].state = RS_NEXT;
goto next_step;
}
}
if (Z_TYPE(child) == IS_UNDEF || Z_TYPE(child) != IS_OBJECT ||
!((ce = Z_OBJCE(child)) && instanceof_function(ce, spl_ce_RecursiveIterator))) {
zval_ptr_dtor(&child);
zend_throw_exception(spl_ce_UnexpectedValueException, "Objects returned by RecursiveIterator::getChildren() must implement RecursiveIterator", 0);
return;
}
if (object->mode == RIT_CHILD_FIRST) {
object->iterators[object->level].state = RS_SELF;
} else {
object->iterators[object->level].state = RS_NEXT;
}
object->iterators = erealloc(object->iterators, sizeof(spl_sub_iterator) * (++object->level+1));
sub_iter = ce->get_iterator(ce, &child, 0);
ZVAL_COPY_VALUE(&object->iterators[object->level].zobject, &child);
object->iterators[object->level].iterator = sub_iter;
object->iterators[object->level].ce = ce;
object->iterators[object->level].state = RS_START;
if (object->level > 0
&& object->iterators[object->level - 1].ce == 0) {
object->iterators[object->level].haschildren =
object->iterators[object->level - 1].haschildren;
object->iterators[object->level].getchildren =
object->iterators[object->level - 1].getchildren;
} else {
object->iterators[object->level].haschildren = NULL;
object->iterators[object->level].getchildren = NULL;
}
if (sub_iter->funcs->rewind) {
sub_iter->funcs->rewind(sub_iter);
}
if (object->beginChildren) {
zend_call_method_with_0_params(Z_OBJ_P(zthis), object->ce, &object->beginChildren, "beginchildren", NULL);
if (EG(exception)) {
if (!(object->flags & RIT_CATCH_GET_CHILD)) {
return;
} else {
zend_clear_exception();
}
}
}
goto next_step;
}
/* no more elements */
if (object->level > 0) {
if (object->endChildren) {
zend_call_method_with_0_params(Z_OBJ_P(zthis), object->ce, &object->endChildren, "endchildren", NULL);
if (EG(exception)) {
if (!(object->flags & RIT_CATCH_GET_CHILD)) {
return;
} else {
zend_clear_exception();
}
}
}
if (object->level > 0) {
zval garbage;
ZVAL_COPY_VALUE(&garbage, &object->iterators[object->level].zobject);
ZVAL_UNDEF(&object->iterators[object->level].zobject);
zval_ptr_dtor(&garbage);
zend_iterator_dtor(iterator);
object->level--;
}
} else {
return; /* done completeley */
}
}
}
static void spl_recursive_it_rewind_ex(spl_recursive_it_object *object, zval *zthis)
{
zend_object_iterator *sub_iter;
SPL_FETCH_SUB_ITERATOR(sub_iter, object);
while (object->level) {
sub_iter = object->iterators[object->level].iterator;
zend_iterator_dtor(sub_iter);
zval_ptr_dtor(&object->iterators[object->level--].zobject);
if (!EG(exception) && (!object->endChildren || object->endChildren->common.scope != spl_ce_RecursiveIteratorIterator)) {
zend_call_method_with_0_params(Z_OBJ_P(zthis), object->ce, &object->endChildren, "endchildren", NULL);
}
}
object->iterators = erealloc(object->iterators, sizeof(spl_sub_iterator));
object->iterators[0].state = RS_START;
sub_iter = object->iterators[0].iterator;
if (sub_iter->funcs->rewind) {
sub_iter->funcs->rewind(sub_iter);
}
if (!EG(exception) && object->beginIteration && !object->in_iteration) {
zend_call_method_with_0_params(Z_OBJ_P(zthis), object->ce, &object->beginIteration, "beginIteration", NULL);
}
object->in_iteration = 1;
spl_recursive_it_move_forward_ex(object, zthis);
}
static void spl_recursive_it_move_forward(zend_object_iterator *iter)
{
spl_recursive_it_move_forward_ex(Z_SPLRECURSIVE_IT_P(&iter->data), &iter->data);
}
static void spl_recursive_it_rewind(zend_object_iterator *iter)
{
spl_recursive_it_rewind_ex(Z_SPLRECURSIVE_IT_P(&iter->data), &iter->data);
}
static const zend_object_iterator_funcs spl_recursive_it_iterator_funcs = {
spl_recursive_it_dtor,
spl_recursive_it_valid,
spl_recursive_it_get_current_data,
spl_recursive_it_get_current_key,
spl_recursive_it_move_forward,
spl_recursive_it_rewind,
NULL,
NULL, /* get_gc */
};
static zend_object_iterator *spl_recursive_it_get_iterator(zend_class_entry *ce, zval *zobject, int by_ref)
{
if (by_ref) {
zend_throw_error(NULL, "An iterator cannot be used with foreach by reference");
return NULL;
}
spl_recursive_it_object *object = Z_SPLRECURSIVE_IT_P(zobject);
if (object->iterators == NULL) {
zend_throw_error(NULL, "Object is not initialized");
return NULL;
}
spl_recursive_it_iterator *iterator = emalloc(sizeof(spl_recursive_it_iterator));
zend_iterator_init((zend_object_iterator*)iterator);
ZVAL_OBJ_COPY(&iterator->intern.data, Z_OBJ_P(zobject));
iterator->intern.funcs = &spl_recursive_it_iterator_funcs;
return (zend_object_iterator*)iterator;
}
static zend_result spl_get_iterator_from_aggregate(zval *retval, zend_class_entry *ce, zend_object *obj) {
zend_function **getiterator_cache =
ce->iterator_funcs_ptr ? &ce->iterator_funcs_ptr->zf_new_iterator : NULL;
zend_call_method_with_0_params(obj, ce, getiterator_cache, "getiterator", retval);
if (EG(exception)) {
return FAILURE;
}
if (Z_TYPE_P(retval) != IS_OBJECT
|| !instanceof_function(Z_OBJCE_P(retval), zend_ce_traversable)) {
zend_throw_exception_ex(spl_ce_LogicException, 0,
"%s::getIterator() must return an object that implements Traversable",
ZSTR_VAL(ce->name));
zval_ptr_dtor(retval);
return FAILURE;
}
return SUCCESS;
}
static void spl_recursive_it_it_construct(INTERNAL_FUNCTION_PARAMETERS, zend_class_entry *ce_base, zend_class_entry *ce_inner, recursive_it_it_type rit_type)
{
zval *object = ZEND_THIS;
spl_recursive_it_object *intern;
zval *iterator;
zend_class_entry *ce_iterator;
zend_long mode, flags;
zval caching_it, aggregate_retval;
switch (rit_type) {
case RIT_RecursiveTreeIterator: {
zend_long user_caching_it_flags = CIT_CATCH_GET_CHILD;
mode = RIT_SELF_FIRST;
flags = RTIT_BYPASS_KEY;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "o|lll", &iterator, &flags, &user_caching_it_flags, &mode) == FAILURE) {
RETURN_THROWS();
}
if (instanceof_function(Z_OBJCE_P(iterator), zend_ce_aggregate)) {
if (spl_get_iterator_from_aggregate(
&aggregate_retval, Z_OBJCE_P(iterator), Z_OBJ_P(iterator)) == FAILURE) {
RETURN_THROWS();
}
iterator = &aggregate_retval;
} else {
Z_ADDREF_P(iterator);
}
zval params[2];
ZVAL_COPY_VALUE(¶ms[0], iterator);
ZVAL_LONG(¶ms[1], user_caching_it_flags);
zend_result is_initialized = object_init_with_constructor(&caching_it, spl_ce_RecursiveCachingIterator, 2, params, NULL);
zval_ptr_dtor(¶ms[0]);
if (is_initialized == FAILURE) {
RETURN_THROWS();
}
iterator = &caching_it;
break;
}
case RIT_RecursiveIteratorIterator:
default: {
mode = RIT_LEAVES_ONLY;
flags = 0;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "o|ll", &iterator, &mode, &flags) == FAILURE) {
RETURN_THROWS();
}
if (instanceof_function(Z_OBJCE_P(iterator), zend_ce_aggregate)) {
if (spl_get_iterator_from_aggregate(
&aggregate_retval, Z_OBJCE_P(iterator), Z_OBJ_P(iterator)) == FAILURE) {
RETURN_THROWS();
}
iterator = &aggregate_retval;
} else {
Z_ADDREF_P(iterator);
}
break;
}
}
if (!instanceof_function(Z_OBJCE_P(iterator), spl_ce_RecursiveIterator)) {
if (iterator) {
zval_ptr_dtor(iterator);
}
zend_throw_exception(spl_ce_InvalidArgumentException, "An instance of RecursiveIterator or IteratorAggregate creating it is required", 0);
return;
}
intern = Z_SPLRECURSIVE_IT_P(object);
intern->iterators = emalloc(sizeof(spl_sub_iterator));
intern->level = 0;
intern->mode = mode;
intern->flags = (int)flags;
intern->max_depth = -1;
intern->in_iteration = 0;
intern->ce = Z_OBJCE_P(object);
intern->beginIteration = zend_hash_str_find_ptr(&intern->ce->function_table, "beginiteration", sizeof("beginiteration") - 1);
if (intern->beginIteration->common.scope == ce_base) {
intern->beginIteration = NULL;
}
intern->endIteration = zend_hash_str_find_ptr(&intern->ce->function_table, "enditeration", sizeof("enditeration") - 1);
if (intern->endIteration->common.scope == ce_base) {
intern->endIteration = NULL;
}
intern->callHasChildren = zend_hash_str_find_ptr(&intern->ce->function_table, "callhaschildren", sizeof("callHasChildren") - 1);
if (intern->callHasChildren->common.scope == ce_base) {
intern->callHasChildren = NULL;
}
intern->callGetChildren = zend_hash_str_find_ptr(&intern->ce->function_table, "callgetchildren", sizeof("callGetChildren") - 1);
if (intern->callGetChildren->common.scope == ce_base) {
intern->callGetChildren = NULL;
}
intern->beginChildren = zend_hash_str_find_ptr(&intern->ce->function_table, "beginchildren", sizeof("beginchildren") - 1);
if (intern->beginChildren->common.scope == ce_base) {
intern->beginChildren = NULL;
}
intern->endChildren = zend_hash_str_find_ptr(&intern->ce->function_table, "endchildren", sizeof("endchildren") - 1);
if (intern->endChildren->common.scope == ce_base) {
intern->endChildren = NULL;
}
intern->nextElement = zend_hash_str_find_ptr(&intern->ce->function_table, "nextelement", sizeof("nextElement") - 1);
if (intern->nextElement->common.scope == ce_base) {
intern->nextElement = NULL;
}
ce_iterator = Z_OBJCE_P(iterator); /* respect inheritance, don't use spl_ce_RecursiveIterator */
intern->iterators[0].iterator = ce_iterator->get_iterator(ce_iterator, iterator, 0);
ZVAL_OBJ(&intern->iterators[0].zobject, Z_OBJ_P(iterator));
intern->iterators[0].ce = ce_iterator;
intern->iterators[0].state = RS_START;
intern->iterators[0].haschildren = NULL;
intern->iterators[0].getchildren = NULL;
if (EG(exception)) {
zend_object_iterator *sub_iter;
while (intern->level >= 0) {
sub_iter = intern->iterators[intern->level].iterator;
zend_iterator_dtor(sub_iter);
zval_ptr_dtor(&intern->iterators[intern->level--].zobject);
}
efree(intern->iterators);
intern->iterators = NULL;
}
}
/* {{{ Creates a RecursiveIteratorIterator from a RecursiveIterator. */
PHP_METHOD(RecursiveIteratorIterator, __construct)
{
spl_recursive_it_it_construct(INTERNAL_FUNCTION_PARAM_PASSTHRU, spl_ce_RecursiveIteratorIterator, zend_ce_iterator, RIT_RecursiveIteratorIterator);
} /* }}} */
/* {{{ Rewind the iterator to the first element of the top level inner iterator. */
PHP_METHOD(RecursiveIteratorIterator, rewind)
{
spl_recursive_it_object *object = Z_SPLRECURSIVE_IT_P(ZEND_THIS);
ZEND_PARSE_PARAMETERS_NONE();
spl_recursive_it_rewind_ex(object, ZEND_THIS);
} /* }}} */
/* {{{ Check whether the current position is valid */
PHP_METHOD(RecursiveIteratorIterator, valid)
{
spl_recursive_it_object *object = Z_SPLRECURSIVE_IT_P(ZEND_THIS);
ZEND_PARSE_PARAMETERS_NONE();
RETURN_BOOL(spl_recursive_it_valid_ex(object, ZEND_THIS) == SUCCESS);
} /* }}} */
/* {{{ Access the current key */
PHP_METHOD(RecursiveIteratorIterator, key)
{
spl_recursive_it_object *object = Z_SPLRECURSIVE_IT_P(ZEND_THIS);
zend_object_iterator *iterator;
ZEND_PARSE_PARAMETERS_NONE();
SPL_FETCH_SUB_ITERATOR(iterator, object);
if (iterator->funcs->get_current_key) {
iterator->funcs->get_current_key(iterator, return_value);
} else {
RETURN_NULL();
}
} /* }}} */
/* {{{ Access the current element value */
PHP_METHOD(RecursiveIteratorIterator, current)
{
spl_recursive_it_object *object = Z_SPLRECURSIVE_IT_P(ZEND_THIS);
zend_object_iterator *iterator;
zval *data;
ZEND_PARSE_PARAMETERS_NONE();
SPL_FETCH_SUB_ITERATOR(iterator, object);
data = iterator->funcs->get_current_data(iterator);
if (data) {
RETURN_COPY_DEREF(data);
}
} /* }}} */
/* {{{ Move forward to the next element */
PHP_METHOD(RecursiveIteratorIterator, next)
{
spl_recursive_it_object *object = Z_SPLRECURSIVE_IT_P(ZEND_THIS);
ZEND_PARSE_PARAMETERS_NONE();
spl_recursive_it_move_forward_ex(object, ZEND_THIS);
} /* }}} */
/* {{{ Get the current depth of the recursive iteration */
PHP_METHOD(RecursiveIteratorIterator, getDepth)
{
spl_recursive_it_object *object = Z_SPLRECURSIVE_IT_P(ZEND_THIS);
ZEND_PARSE_PARAMETERS_NONE();
RETURN_LONG(object->level);
} /* }}} */
/* {{{ The current active sub iterator or the iterator at specified level */
PHP_METHOD(RecursiveIteratorIterator, getSubIterator)
{
spl_recursive_it_object *object = Z_SPLRECURSIVE_IT_P(ZEND_THIS);
zend_long level;
bool level_is_null = 1;
zval *value;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "|l!", &level, &level_is_null) == FAILURE) {
RETURN_THROWS();
}
if (level_is_null) {
level = object->level;
} else if (level < 0 || level > object->level) {
RETURN_NULL();
}
if(!object->iterators) {
zend_throw_error(NULL, "The object is in an invalid state as the parent constructor was not called");
RETURN_THROWS();
}
value = &object->iterators[level].zobject;
RETURN_COPY_DEREF(value);
} /* }}} */
/* {{{ The current active sub iterator */
PHP_METHOD(RecursiveIteratorIterator, getInnerIterator)
{
spl_recursive_it_object *object = Z_SPLRECURSIVE_IT_P(ZEND_THIS);
zval *zobject;
ZEND_PARSE_PARAMETERS_NONE();
SPL_FETCH_SUB_ELEMENT_ADDR(zobject, object, zobject);
RETURN_COPY_DEREF(zobject);
} /* }}} */
/* {{{ Called when iteration begins (after first rewind() call) */
PHP_METHOD(RecursiveIteratorIterator, beginIteration)
{
ZEND_PARSE_PARAMETERS_NONE();
/* nothing to do */
} /* }}} */
/* {{{ Called when iteration ends (when valid() first returns false */
PHP_METHOD(RecursiveIteratorIterator, endIteration)
{
ZEND_PARSE_PARAMETERS_NONE();
/* nothing to do */
} /* }}} */
/* {{{ Called for each element to test whether it has children */
PHP_METHOD(RecursiveIteratorIterator, callHasChildren)
{
spl_recursive_it_object *object = Z_SPLRECURSIVE_IT_P(ZEND_THIS);
zend_class_entry *ce;
zval *zobject;
ZEND_PARSE_PARAMETERS_NONE();
if (!object->iterators) {
RETURN_FALSE;
}
SPL_FETCH_SUB_ELEMENT(ce, object, ce);
zobject = &object->iterators[object->level].zobject;
if (Z_TYPE_P(zobject) == IS_UNDEF) {
RETURN_FALSE;
} else {
zend_call_method_with_0_params(Z_OBJ_P(zobject), ce, &object->iterators[object->level].haschildren, "haschildren", return_value);
if (Z_TYPE_P(return_value) == IS_UNDEF) {
RETURN_FALSE;
}
}
} /* }}} */
/* {{{ Return children of current element */
PHP_METHOD(RecursiveIteratorIterator, callGetChildren)
{
spl_recursive_it_object *object = Z_SPLRECURSIVE_IT_P(ZEND_THIS);
zend_class_entry *ce;
zval *zobject;
ZEND_PARSE_PARAMETERS_NONE();
SPL_FETCH_SUB_ELEMENT(ce, object, ce);
zobject = &object->iterators[object->level].zobject;
if (Z_TYPE_P(zobject) == IS_UNDEF) {
RETURN_NULL();
} else {
zend_call_method_with_0_params(Z_OBJ_P(zobject), ce, &object->iterators[object->level].getchildren, "getchildren", return_value);
if (Z_TYPE_P(return_value) == IS_UNDEF) {
RETURN_NULL();
}
}
} /* }}} */
/* {{{ Called when recursing one level down */
PHP_METHOD(RecursiveIteratorIterator, beginChildren)
{
ZEND_PARSE_PARAMETERS_NONE();
/* nothing to do */
} /* }}} */
/* {{{ Called when end recursing one level */
PHP_METHOD(RecursiveIteratorIterator, endChildren)
{
ZEND_PARSE_PARAMETERS_NONE();
/* nothing to do */
} /* }}} */
/* {{{ Called when the next element is available */
PHP_METHOD(RecursiveIteratorIterator, nextElement)
{
ZEND_PARSE_PARAMETERS_NONE();
/* nothing to do */
} /* }}} */
/* {{{ Set the maximum allowed depth (or any depth if pmax_depth = -1] */
PHP_METHOD(RecursiveIteratorIterator, setMaxDepth)
{
spl_recursive_it_object *object = Z_SPLRECURSIVE_IT_P(ZEND_THIS);
zend_long max_depth = -1;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "|l", &max_depth) == FAILURE) {
RETURN_THROWS();
}
if (max_depth < -1) {
zend_argument_value_error(1, "must be greater than or equal to -1");
RETURN_THROWS();
} else if (max_depth > INT_MAX) {
max_depth = INT_MAX;
}
object->max_depth = (int)max_depth;
} /* }}} */
/* {{{ Return the maximum accepted depth or false if any depth is allowed */
PHP_METHOD(RecursiveIteratorIterator, getMaxDepth)
{
spl_recursive_it_object *object = Z_SPLRECURSIVE_IT_P(ZEND_THIS);
ZEND_PARSE_PARAMETERS_NONE();
if (object->max_depth == -1) {
RETURN_FALSE;
} else {
RETURN_LONG(object->max_depth);
}
} /* }}} */
static zend_function *spl_recursive_it_get_method(zend_object **zobject, zend_string *method, const zval *key)
{
zend_function *function_handler;
spl_recursive_it_object *object = spl_recursive_it_from_obj(*zobject);
zend_long level = object->level;
zval *zobj;
if (!object->iterators) {
zend_throw_error(NULL, "The %s instance wasn't initialized properly", ZSTR_VAL((*zobject)->ce->name));
return NULL;
}
zobj = &object->iterators[level].zobject;
function_handler = zend_std_get_method(zobject, method, key);
if (!function_handler) {
if ((function_handler = zend_hash_find_ptr(&Z_OBJCE_P(zobj)->function_table, method)) == NULL) {
*zobject = Z_OBJ_P(zobj);
function_handler = (*zobject)->handlers->get_method(zobject, method, key);
} else {
*zobject = Z_OBJ_P(zobj);
}
}
return function_handler;
}
/* {{{ spl_RecursiveIteratorIterator_free_storage */
static void spl_RecursiveIteratorIterator_free_storage(zend_object *_object)
{
spl_recursive_it_object *object = spl_recursive_it_from_obj(_object);
if (object->iterators) {
while (object->level >= 0) {
zend_object_iterator *sub_iter = object->iterators[object->level].iterator;
zend_iterator_dtor(sub_iter);
zval_ptr_dtor(&object->iterators[object->level].zobject);
object->level--;
}
efree(object->iterators);
object->iterators = NULL;
}
zend_object_std_dtor(&object->std);
for (size_t i = 0; i < 6; i++) {
if (object->prefix[i]) {
zend_string_release(object->prefix[i]);
}
}
if (object->postfix[0]) {
zend_string_release(object->postfix[0]);
}
}
/* }}} */
static HashTable *spl_RecursiveIteratorIterator_get_gc(zend_object *obj, zval **table, int *n)
{
spl_recursive_it_object *object = spl_recursive_it_from_obj(obj);
zend_get_gc_buffer *gc_buffer = zend_get_gc_buffer_create();
if (object->iterators) {
for (int level = 0; level <= object->level; level++) {
zend_get_gc_buffer_add_zval(gc_buffer, &object->iterators[level].zobject);
zend_get_gc_buffer_add_obj(gc_buffer, &object->iterators[level].iterator->std);
}
}
zend_get_gc_buffer_use(gc_buffer, table, n);
return zend_std_get_properties(obj);
}
/* {{{ spl_RecursiveIteratorIterator_new_ex */
static zend_object *spl_RecursiveIteratorIterator_new_ex(zend_class_entry *class_type, int init_prefix)
{
spl_recursive_it_object *intern;
intern = zend_object_alloc(sizeof(spl_recursive_it_object), class_type);
if (init_prefix) {
intern->prefix[0] = ZSTR_EMPTY_ALLOC();
intern->prefix[1] = ZSTR_INIT_LITERAL("| ", 0);
intern->prefix[2] = ZSTR_INIT_LITERAL(" ", 0);
intern->prefix[3] = ZSTR_INIT_LITERAL("|-", 0);
intern->prefix[4] = ZSTR_INIT_LITERAL("\\-", 0);
intern->prefix[5] = ZSTR_EMPTY_ALLOC();
intern->postfix[0] = ZSTR_EMPTY_ALLOC();
}
zend_object_std_init(&intern->std, class_type);
object_properties_init(&intern->std, class_type);
return &intern->std;
}
/* }}} */
/* {{{ spl_RecursiveIteratorIterator_new */
static zend_object *spl_RecursiveIteratorIterator_new(zend_class_entry *class_type)
{
return spl_RecursiveIteratorIterator_new_ex(class_type, 0);
}
/* }}} */
/* {{{ spl_RecursiveTreeIterator_new */
static zend_object *spl_RecursiveTreeIterator_new(zend_class_entry *class_type)
{
return spl_RecursiveIteratorIterator_new_ex(class_type, 1);
}
/* }}} */
static zend_string *spl_recursive_tree_iterator_get_prefix(spl_recursive_it_object *object)
{
smart_str str = {0};
zval has_next;
int level;
smart_str_append(&str, object->prefix[0]);